Create SSL Certificate (Self Signed)

Create Self Signed SSL Certificate by yourself. It had beeter to use Self Signed Certificate on the environment for the purpose of testing, develomement, and so on, not recommended to use on production System.

[root@dlp ~]# cd /etc/pki/tls/certs

[root@dlp certs]# openssl genrsa -aes128 2048 > server.key

Generating RSA private key, 2048 bit long modulus

.+++

............................................................................+++

e is 65537 (0x010001)

Enter pass phrase:                  # set passphrase

Verifying - Enter pass phrase:      # confirm


# remove passphrase from private key

[root@dlp certs]# openssl rsa -in server.key -out server.key

Enter pass phrase for server.key:   # input passphrase

writing RSA key


[root@dlp certs]# openssl req -utf8 -new -key server.key -out server.csr

You are about to be asked to enter information that will be incorporated

into your certificate request.

What you are about to enter is what is called a Distinguished Name or a DN.

There are quite a few fields but you can leave some blank

For some fields there will be a default value,

If you enter '.', the field will be left blank.

-----

Country Name (2 letter code) [XX]:JP   # country code

State or Province Name (full name) []:Hiroshima    # state

Locality Name (eg, city) [Default City]:Hiroshima  # city

Organization Name (eg, company) [Default Company Ltd]:GTS  # company

Organizational Unit Name (eg, section) []:Server World     # department

Common Name (eg, your name or your server's hostname) []:dlp.srv.world  # server's FQDN

Email Address []:root@srv.world   # admin email address


Please enter the following 'extra' attributes

to be sent with your certificate request

A challenge password []:

An optional company name []:


# create certificate with 10 years expiration date

[root@dlp certs]# openssl x509 -in server.csr -out server.crt -req -signkey server.key -days 3650

Signature ok

subject=C = JP, ST = Hiroshima, L = Hiroshima, O = GTS, OU = Server World, CN = dlp.srv.world, emailAddress = root@srv.world

Getting Private key

[root@dlp certs]# chmod 600 server.key

[root@dlp certs]# ll server.*

-rw-r--r--. 1 root root 1334 Sep 26 01:05 server.crt

-rw-r--r--. 1 root root 1062 Sep 26 01:03 server.csr

-rw-------. 1 root root 1679 Sep 26 01:02 server.key

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